JAVA用swing做个日历

JAVA作业，我比作业要求的多加了些功能，可以滚轮和键盘左右键翻页快捷键做的也许比较傻吧，监听到就直接doClick();沉迷JAVA,对于我这种以前只写过控制台程序的来说，图形界面真是打开了新世界

//MySwingCalendar.javapackage test2;import java.awt.BorderLayout;import java.awt.Color;import java.awt.FlowLayout;import java.awt.GridLayout;import java.awt.KeyEventPostProcessor;import java.awt.KeyboardFocusManager;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.awt.event.KeyEvent;import java.awt.event.MouseWheelEvent;import java.awt.event.MouseWheelListener;import java.awt.event.WindowAdapter;import java.awt.event.WindowEvent;import java.util.Calendar;import javax.swing.ImageIcon;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JPanel;import javax.swing.border.BevelBorder;import javax.swing.border.CompoundBorder;public class MySwingCalendar extends JFrame{    /** *  */private static final long serialVersionUID = 1L;private Calendar calendar;private final static String week[]={"日","一","二","三","四","五","六"};private JLabel dayLable[][]=new JLabel[6][7],monthLable;        private void initCalendar() {    calendar=Calendar.getInstance();    calendar.set(Calendar.DATE,0);    }         private void initFrame() {    setIconImage(new ImageIcon("icon\\Calendar.gif").getImage());    setSize(500, 300);    getContentPane().setLayout(new BorderLayout());    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);    setLocationRelativeTo(null);    addWindowListener(new WindowAdapter() {@Overridepublic void windowOpened(WindowEvent e) {requestFocus();}});    }    public MySwingCalendar() {super("Calendar");    initCalendar();    initFrame();    JPanel northPanel=new JPanel(new FlowLayout(FlowLayout.CENTER));    JButton preMonth=new JButton("上月");    preMonth.addActionListener(new ActionListener() {        @Override    public void actionPerformed(ActionEvent e) {    calendarAdd(-1);    }    });    northPanel.add(preMonth);    JButton nextMonth=new JButton("下月");    nextMonth.addActionListener(new ActionListener() {        @Override    public void actionPerformed(ActionEvent e) {    calendarAdd(1);    }    });    northPanel.add(nextMonth);    getContentPane().add(northPanel,BorderLayout.NORTH);        JPanel centerPanel=new JPanel(new GridLayout(7, 7,1,1));    centerPanel.setBorder(new BevelBorder(BevelBorder.LOWERED));    for(String s:week)    {    JButton weekButton=new JButton(s);    weekButton.addActionListener(new ActionListener() {@Overridepublic void actionPerformed(ActionEvent e) {requestFocus();}});    centerPanel.add(weekButton);    }    for(int i=0;i<6;i++)    {    for(int j=0;j<7;j++)    {    JPanel tempJpanel=new JPanel();    dayLable[i][j]=new JLabel();    //dayLable[i][j].enableInputMethods(true);    dayLable[i][j].setHorizontalAlignment(JLabel.CENTER);    if(j%2==0)tempJpanel.setBackground(Color.white);    else tempJpanel.setBackground(Color.lightGray);    tempJpanel.add(dayLable[i][j]);    centerPanel.add(tempJpanel);    }    }    getContentPane().add(centerPanel, BorderLayout.CENTER);        JPanel southPanel=new JPanel(new FlowLayout(FlowLayout.CENTER));    monthLable=new JLabel();    southPanel.add(monthLable);    getContentPane().add(southPanel,BorderLayout.SOUTH);    updateCalendar();    KeyboardFocusManager.getCurrentKeyboardFocusManager().addKeyEventPostProcessor(new KeyEventPostProcessor() {    private long lastLeftPress=0;    private long lastRightPress=0;    @Overridepublic boolean postProcessKeyEvent(KeyEvent e) {long currentTime=System.currentTimeMillis();if(e.getID() == KeyEvent.KEY_PRESSED){if (e.getKeyCode() == KeyEvent.VK_LEFT&¤tTime-lastLeftPress>100) {lastLeftPress = currentTime;preMonth.requestFocus();preMonth.doClick();} else if (e.getKeyCode() == KeyEvent.VK_RIGHT&¤tTime-lastRightPress>100) {lastRightPress = currentTime;nextMonth.requestFocus();nextMonth.doClick();}}return false;}});    addMouseWheelListener(new MouseWheelListener() {    private long lastMove=0;@Overridepublic void mouseWheelMoved(MouseWheelEvent e) {int wheelRotation=e.getWheelRotation();long currentTime=System.currentTimeMillis();    if(wheelRotation==-1&¤tTime-lastMove>70){    lastMove=currentTime;preMonth.requestFocus();preMonth.doClick();}     else if(wheelRotation==1&¤tTime-lastMove>70){    lastMove=currentTime;    nextMonth.requestFocus();    nextMonth.doClick();} }});            setVisible(true);}        public String toString(){    String s=calendar.get(Calendar.YEAR)+"年"+(calendar.get(Calendar.MONTH)+1)+"月\n";    for(String i:week)s+="  "+i;    s+="\n";    int day=calendar.get(Calendar.DAY_OF_WEEK)%7;    for(int i=0;i<day;i++)s+="    ";    int maxDay=calendar.getActualMaximum(Calendar.DAY_OF_MONTH);    for(int i=1;i<=maxDay;i++)    {    s+=String.format("%4d",i);    if(day==6)    {    s+="\n";    day=0;    }    else day++;    }    return s;    }        private void updateCalendar() {    int i=0,j=calendar.get(Calendar.DAY_OF_WEEK)%7;;    int maxDay=calendar.getActualMaximum(Calendar.DAY_OF_MONTH);    //System.out.println(this);    for(int k=0;k<j;k++)dayLable[0][k].setText("");    for(int k=1;k<=maxDay;k++)    {    dayLable[i][j].setText(Integer.toString(k));    if(j==6)    {    i++;    j=0;    }    else j++;    }    while(i<6)    {    dayLable[i][j].setText("");    if(j==6)    {    i++;    j=0;    }    else j++;    }    monthLable.setText("日历："+calendar.get(Calendar.YEAR)+"年"+(calendar.get(Calendar.MONTH)+1)+"月");    }        public void calendarAdd(int delta)    {    calendar.add(Calendar.MONTH,delta);    updateCalendar();    }        public static void main(String args[]) {    new MySwingCalendar();    }}